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Ultra-low-loss optical delay line on a silicon chip

Author

Listed:
  • Hansuek Lee

    (T. J. Watson Laboratory of Applied Physics, California Institute of Technology)

  • Tong Chen

    (T. J. Watson Laboratory of Applied Physics, California Institute of Technology)

  • Jiang Li

    (T. J. Watson Laboratory of Applied Physics, California Institute of Technology)

  • Oskar Painter

    (T. J. Watson Laboratory of Applied Physics, California Institute of Technology)

  • Kerry J. Vahala

    (T. J. Watson Laboratory of Applied Physics, California Institute of Technology)

Abstract

Light propagation through an optical fibre causes a long, non-resonant (true) time delay used in numerous applications. In contrast to how it is deployed in optical communication systems, fibre is coiled in these applications to reduce footprint. This is a configuration better suited for a chip-based waveguide that would improve shock resistance, and afford the possibility of integration for system-on-a-chip functionality. However, integrated waveguide attenuation rates lag far behind the corresponding rates of optical fibre, featuring attenuation many orders larger. Here we demonstrate a monolithic waveguide as long as 27 m (39 m optical path length), and featuring broadband loss rate values of (0.08±0.01) dB m−1 measured over 7 m by optical backscatter. Resonator measurements show a further reduction of loss to 0.037 dB m−1, close to that of optical fibres when first considered a viable technology. Scaling this waveguide to integrated spans exceeding 250 m and attenuation rates below 0.01 dB m−1 is discussed.

Suggested Citation

  • Hansuek Lee & Tong Chen & Jiang Li & Oskar Painter & Kerry J. Vahala, 2012. "Ultra-low-loss optical delay line on a silicon chip," Nature Communications, Nature, vol. 3(1), pages 1-7, January.
    • Handle: RePEc:nat:natcom:v:3:y:2012:i:1:d:10.1038_ncomms1876
    DOI: 10.1038/ncomms1876
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    Cited by:

    1. Emma Lomonte & Martin A. Wolff & Fabian Beutel & Simone Ferrari & Carsten Schuck & Wolfram H. P. Pernice & Francesco Lenzini, 2021. "Single-photon detection and cryogenic reconfigurability in lithium niobate nanophotonic circuits," Nature Communications, Nature, vol. 12(1), pages 1-10, December.
    2. Michael Hollenbach & Nico Klingner & Nagesh S. Jagtap & Lothar Bischoff & Ciarán Fowley & Ulrich Kentsch & Gregor Hlawacek & Artur Erbe & Nikolay V. Abrosimov & Manfred Helm & Yonder Berencén & Georgy, 2022. "Wafer-scale nanofabrication of telecom single-photon emitters in silicon," Nature Communications, Nature, vol. 13(1), pages 1-7, December.

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